Benzoquinones on:
[Wikipedia]
[Google]
[Amazon]
Benzoquinone (C6H4O2) is a quinone with a single 
*1,3-benzoquinone "does not exist, because its structure would be nonplanar and highly strained", though derivatives are known.
An alkylated ''p''-benzoquinone has been found in the rhizomes of ''
benzene ring
Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atom ...
. There are 2 (out of 3 hypothetical) benzoquinones:
* 1,4-Benzoquinone, most commonly, right image (also ''para''-benzoquinone, ''p''-benzoquinone, ''para''-quinone, or just quinone)
* 1,2-Benzoquinone, less commonly, left image (also ''ortho''-benzoquinone, ''o''-benzoquinone, ''ortho''-quinone)
*1,3-benzoquinone "does not exist, because its structure would be nonplanar and highly strained", though derivatives are known.
An alkylated ''p''-benzoquinone has been found in the rhizomes of ''Iris kemaonensis
''Iris kemaonensis'', the Kumaon iris, is a plant species in the genus '' Iris'', it is also in the subgenus '' Iris'' and in the section ''Pseudoregelia''. It is a rhizomatous perennial, from Tibetan China, Bhutan, India, Kashmir and Nepal. I ...
''.
See also
*Arene substitution pattern
Arene substitution patterns are part of organic chemistry IUPAC nomenclature and pinpoint the position of substituents other than hydrogen in relation to each other on an aromatic hydrocarbon.
''Ortho'', ''meta'', and ''para'' substitution
* ...
References
{{Chemistry index